Washout-plug.



' T. F. HAYES.

WASHOUT PLUG. APPLICATION FILED APR. 6. 1915.

Patented Dec. 14, 1915.

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awe/M 040 I: E 15 6/13 THOMAS F. HAYES, OF JACKSON, TENNESSEE, ASSIGNOR- OF TWENTY-FOUR ONE- HUNDRED'IHS TO HAL HOWARD AND TWENTY-FOUR ONE-HUNDREDTHS TO FRANK BOND WILKINSON, BOTH OF JACKSON, TENNESSEE.

. WASHOUT-PLUG.

To all whom it may concerh:

Be it known that I, THOMAS F. HAYES,

a citizen of the United States, residing at Jackson, in the countyof Madison and State of Tennessee, have invented certain'new and useful Improvements in Washout-Plugs, of

which the following is a specification.

This invention relates to wash-out plugs for steam boilers and has as its object to provide a plug of such construction that it may be readily removed and replaced whenever desired without likelihood of enlarging the opening in the boiler sheet provided for its reception.

Ordinarily, wash-out plugs are threaded directly into openings tappedv in the boiler sheet and after the plugs have been removed and replaced several times, the threads in the Walls of the. openings become so worn as to necessitate retapping o the openings, also as to prevent steam tight fitting of the plug within the opening, in either of which events it is likely that the plug will be blown out or damage otherwise causedl It is therefore one aim of the present invention 'to provide a plug 'so constructed that, although it may be frequently removed and replaced, it will, at all times, in a steam tight manner, fit its seat in the boiler sheet.

In the accompanying drawing: Figure 1 is a vertical transverse sectional view through the plug embodying the present invention; Fig. 2 is a "iew in side elevation thereof;

Fig. 8 is a vertical transverse sectional view through the cap of the device; Fig. 4 is a similar view of the plug proper; Fig. 5 is a similar. view of the bushing of the device;

Fig. 6 is a top plan View of the plug;

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

The device embodying the present invention includes a bushing which is to be fitted into an opening tapped in the boiler sheet,

a plug proper which is removably fitted-into the bushing, and a cap which is fitted onto the bushing and closes the outer end thereof and protects the said plug.

50 "In the drawing, the bushing is indicated by'the numeral 1 and this bushing isinteriorly threaded, as indicated at 2 and exteriorly tapered from its middle toward either end as shown in Figs. 1, 2 and 5 of Specification of Letters Patent.

Patented lDec. it, 11915.

Applieation filed April 6, 1915. Serial No. 19,582.

the drawing and threaded as at 3. At one end, the bushing is threaded into an opennig tapped in the boiler sheet, indicated in the drawing by the numeral 4. .At its outer end, the bushing 1 is formed interiorly with a seat or annular groove 5, one wall of which, indicated by the numeral 6, constitutes a seating shoulder 'for the end of the plug proper, as will be presently explained and this shoulder 6 is preferably ground to a smooth surface as is also the corresponding end of the bushing. This latter seating portion, indicated at 7,

to be presently explained.

The plug proper comprises a substantially cylindrical body 8 which is exteriorly threaded, as indicated by the numeral 9, and removably fitted into the outer end of the bushing 1 and in. order that the plug may be removed and applied, it is formed with a socket 10 which is squared or otherwise formed for the insertion of a socket wrench or the plug maybe provided with any other .means for-application thereto of a suitable wrench for the purpose stated. At its outer end, the plug is formed with a circumscribing shoulder or flange 11 which, when the plug is threaded into the bushing, seats against the shoulder 6 and forms a steam tight connection. It will be observed that theflange 11 is of a thickness substantially equal to the depth of the grooveor seat 5 in the outer end of the bushing so that the said flange is received within this seat or 1 groove.

As before stated, a cap is provided for closing the outer end of the bushing and 1 protecting theplug and this cap comprises a body, indicated at 12, and provided with a circumscribing flange 13 which is interiorly threaded, as indicated at 14, whereby the cap may be threaded onto-the, said outer end of the bushing. The inner face of the body 12 is formed with a recess 15 and sur-v serves a purpose place until the seating shoulder 16 bears firmly against and forms a steam tight fit with the seating surface 7 The cap 12 serves not only to close the bushing, but also as a'means for protecting the plug and as anadditional means for preventing escape of steam.

Having thus described the invention, what is claimed as new is:

1. A washout plug comprising a seat having a threadedbore,-the seat being exteriorly threaded and adapted to be threaded at one end into a boiler sheet, the bore of the seat at the other end of the said seat being enlarged, whereby to form a shoulder, a plug removably threaded into the bore of the seat and having a fiange'snugly fitting within the enlarged end of the bore and bearing snugly against the shoulder, and a cap removably fitted onto the last mentioned end of the seat, the cap being provided interiorly with a seating shoulder arranged to bear directly against the end of-the said seat.

2. A device of the class described comprising a hollow substantially cylindrical seat exteriorly threaded at each end toward the middle and interiorly threaded from its inner end to a point adjacent its outer end,

of the bushing.

the seat at its outer end being formed interiorly with an annular recess resulting from an enlargement in the bore of the seat at the last mentioned" end of its interiorly threaded portion, the bottom wall of the recess constituting a shoulder, a plug threaded into the said outer end of the'seat and provided at its outer end with an annular shoulder projecting beyond the circumferential surface of the plug and arranged to hear at its under side firmly against the shoulder formed by the bottom wall of the said annularrecess, and a cap threaded onto the outer end of the said seat and provided interiorly with a recess in the underside of its top and with an annular shoulder surrounding the said recess, the said recess being adapted to receive the outer end-of the plug and the flange thereof and the said shoulder within the cap being arranged to bear firmly against the outer end of the said plug.

In testimony whereof I atfix my signature in presence of two witnesses.

THQMAS F. HAYES. [L.s.]

lVitnesses:

l/VILLIE SMITH, JAMES M. PATE. 

